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240 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7
Recurved cirri are directed outward. They are cirriform, present
from the third setigerous segment to the end of the pieces, and do not fill
the interramal space. Where best developed, at about the twenty-fifth segment, they extend distally to the neuropodium, but by the fiftieth segment
(pl. 42, fig. 106) they are much smaller.
Parapodia are well developed, the rami of the first few segments approximately as far apart as those of the fifty-fifth segment, but those of
the latter are longer. The postsetal lobes are conspicuous, broad, foliaceous, extending distally nearly as far as the shorter postacicular setae.
They are slightly concave so as to partly envelop the fan-shaped postsetal
fascicles. The preacicular lobes are broadly oval, but comparatively short.
They conceal most of the acicular lobes except for their free ends where
the acicula emerge.
Setae are burnt amber in color. The preacicular fascicle contains 15 to
20 slender, barred setae which are curved at their distal ends, the barred
area limited to the distal half of the free part of the seta. The postacicular
fascicle includes numerous, longer, serrated setae (pl. 42, fig. 109), coarser than the barred setae, and also fewer, almost smooth, though similar
setae in the dorsalmost and ventralmost parts of the notopodial and neuropodial fascicles. No lyre setae have been observed.
Nephthys panamensis has heretofore been known only through a
single, incomplete, macerated individual (Monro, 1928, p. 81). The
individuals described above are believed to be the same because of the
similarity in the parapodial lobes of the median segments, the presence of
a dark neural stripe, and the dark markings on the prostomium.
Distribution.—Panama; Gulf of California. Intertidal, to 50 fms.
Nephthys californiensis Hartman
Nephthys californiensis Hartman, 1938, pp. 150-151, fig. 64.
Collections.—284-34, 871-38, 906-38, Ace. 587, Ace. 590. 12 specimens.
Distribution.—California; Gulf of California. Intertidal, to 30 fms.
Nephthys caecoides Hartman
Nephthys caecoides Hartman, 1938, pp. 148-149, fig. 63.
Collections.—616-37, 876-38, 885-38, 886-38, 887-38, 888-38, 889-
38, 891-38, 892-38, 893-38, 894-38, 896-38, 897-38, 903-38, 905-38, 908-
38, 909-38, 913-39. Numerous specimens.
Distribution.—California; Gulf of California. Intertidal, to 90 fms.

240 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7
Recurved cirri are directed outward. They are cirriform, present
from the third setigerous segment to the end of the pieces, and do not fill
the interramal space. Where best developed, at about the twenty-fifth segment, they extend distally to the neuropodium, but by the fiftieth segment
(pl. 42, fig. 106) they are much smaller.
Parapodia are well developed, the rami of the first few segments approximately as far apart as those of the fifty-fifth segment, but those of
the latter are longer. The postsetal lobes are conspicuous, broad, foliaceous, extending distally nearly as far as the shorter postacicular setae.
They are slightly concave so as to partly envelop the fan-shaped postsetal
fascicles. The preacicular lobes are broadly oval, but comparatively short.
They conceal most of the acicular lobes except for their free ends where
the acicula emerge.
Setae are burnt amber in color. The preacicular fascicle contains 15 to
20 slender, barred setae which are curved at their distal ends, the barred
area limited to the distal half of the free part of the seta. The postacicular
fascicle includes numerous, longer, serrated setae (pl. 42, fig. 109), coarser than the barred setae, and also fewer, almost smooth, though similar
setae in the dorsalmost and ventralmost parts of the notopodial and neuropodial fascicles. No lyre setae have been observed.
Nephthys panamensis has heretofore been known only through a
single, incomplete, macerated individual (Monro, 1928, p. 81). The
individuals described above are believed to be the same because of the
similarity in the parapodial lobes of the median segments, the presence of
a dark neural stripe, and the dark markings on the prostomium.
Distribution.—Panama; Gulf of California. Intertidal, to 50 fms.
Nephthys californiensis Hartman
Nephthys californiensis Hartman, 1938, pp. 150-151, fig. 64.
Collections.—284-34, 871-38, 906-38, Ace. 587, Ace. 590. 12 specimens.
Distribution.—California; Gulf of California. Intertidal, to 30 fms.
Nephthys caecoides Hartman
Nephthys caecoides Hartman, 1938, pp. 148-149, fig. 63.
Collections.—616-37, 876-38, 885-38, 886-38, 887-38, 888-38, 889-
38, 891-38, 892-38, 893-38, 894-38, 896-38, 897-38, 903-38, 905-38, 908-
38, 909-38, 913-39. Numerous specimens.
Distribution.—California; Gulf of California. Intertidal, to 90 fms.